Machine-belting.



'No. 706,044. Patented Aug. 5, I902. M. GILLET.

MACHINE BELTING.

(Application filed May 17, 190K.)

(No Model.)

INVENTEIR'I M ITNEISEEIE fm-I wanna PE'I'IRS c0, FHOTO-UYHO,WASH1NGTON.'O c

, fiber either by treating it to an air-bath, in-

to eliminate the acid as far as possible and UNITED STATES PATENT OFFICE.

MARTIN GILLET, OF ARLINGTON, MASSACHUSETTS, ASSIGNOR TO JULIA G. JORDAN, TRUSTEE, OF MERCHANTVILLE, NEW JERSEY.

BELTING.

SPECIFICATION forming part of Letters Patent No. 706,044, dated August 5, 1902.

Application filed May 17, 1901- To all whom it may concern:

Be it known that I, MARTIN GILLET, of Arlington, in the county of Middlesex and Stateof Massachusetts, have invented certain new and useful Improvements in Machine-Beltin g, of which the following is a specification.

This invention has for its objectto provide a strong, durable, and flexible belting for machinery which shall be insoluble in water and shall be free from liability to have its pulleycontacting surface roughened or abraded by contact with the pulley and in which said su rface shall be kept smooth by such contact, so that the belt will not only be more durable, but will also engage the pulley to better advantage, it being a recognized fact that a belt with a smooth polished surface is more effective and durable than one with a roughened. surface.

The invention consists in the improvementswhich I will now proceed to describe and claim.

The accompanying drawing, forming apart of this specification, represents a sectional view of a strip of belting constructed in accordance with my invention.

In carrying out my invention I take a web of suitable porous paper, such as common blotting-paper, and immerse it in a bath of sulfuric acid, after removal from which it is. subjected to a higher temperature to accelerate the action of the acid in dissolving its which the absorption of moisture from theair by the acid produces the required heat, or by subjecting ittoahot-airbathorblast. When by this means the fiber of the material has been partially dissolved, more or less, according to the nature of the material and the re sult required, it is subjected to pressure to expel the excess of acid and promote the agglutination of the fiber and compact the material together. The material is next treated to a water-bath and to compression therein complete the agglutination of the material into a compact homogeneous mass, this step Serial No. 60,670. No model.)

' of the process being prolonged without interruption until the required effect is produced. I next assemble one or more layers a of the paper treated as above described and one or more layers b of suitable textile fabric untreated, such as cotton duck or canvas, using, by preference, two or more layers of the fabric and three or more layers of the treated paper, the layers alternating, so that both sides of the textile fabric are faced with the prepared paper. These layers are firmly united by pressure while the paper layers are in a comparatively soft and plastic condition, so as to intimately combine the pulpy fibers of the paper with the fibers or meshes of the fabric by the pressureemployed, and thus avoid the use of glue or cement. To prevent the paper layers from subsequently becoming rigid and brittle, I treat them after the removal of the excess of acid withahygroscopic material, such as glycerin, this material absorbing moisture from the atmosphere and keeping the paper layers at all times sufficiently flexible. The improved belting thus constructed isin'soluble in water, so that it can be run in wet places or under water with out detriment. It is, moreover, possessed of a high degree of tensile strength, the paper layers adding considerably to the tensile strength of the cloth layers. Moreover, the paper layers are of such nature that their fibers become condensed and compacted by contact with the pulleys on which the belt runs, so that the inner surface of the belt is kept in a smooth and polished condition, which renders the belt more desirable, durable, and effective than would be the case if its inner surface were frayed or roughened by contact with the pulley. This improved belt is also oil-proof, so that it is not afiected in any way by oil which may be scattered or sprinkled upon it. l

I claim- As an article of manufacture, waterproof machine-belting composed of layers of untreated textile fabric and of paper on both sides of the textile fabric, the paper rendered insoluble in water and hygroscopic, the said the prepared paper constituting the outside layers being united solely by pressure while layers of the laminated belting. m the paper is in a comparatively soft and plas In testimony whereof I have afiixed my sigtic condition intimately to combine the fibers nature in presence of two witnesses. 5 of the paper with the meshes of the fabric,

whereby the use of cement or glue is avoid- Witnesses:

ed, the hygroscopic character of the paper 0. F. BROWN,

preventing it from becoming hard and brittle, E; BATCHELDER.

MARTIN GILLET. 

